Colloids of HEA nanoparticles in an imidazolium-based ionic liquid prepared by magnetron sputtering: Structural and magnetic properties

Bio-high entropy alloys: Progress, challenges, and opportunities

“…Processing is another crucial factor affecting the strength and ductility of the alloy under the premise that the compositions of the Bio-HEAs group elements are clearly defined. Common preparation methods for Bio-HEAs include vacuum arc melting ( Chen et al, 2016 ), electromagnetic induction melting ( George et al, 2020 ), powder metallurgy techniques ( Hu et al, 2022 ), magnetron sputtering ( Dvurečenskij et al, 2022 ), laser electron beam melting ( Arif et al, 2022 ), and 3D printing additive manufacturing ( Wang S. et al, 2022 ). Smelting is the most common preparation method for Bio-HEA, followed by powder metallurgy and additive manufacturing ( Arif et al, 2021 ).…”

“…The phase structure, density, lattice constant, elastic, and electrical properties of The DFT calculates the formation energy of the lowest energy structures in various binary relative to their phase separation into pure elements. If the numbers are in bold blue, the energies are evaluated relative to the respective solid solution (Troparevsky et al, 2015) Frontiers in Bioengineering and Biotechnology frontiersin.org 2022) used the first-principles approach combined with a thermodynamic model to study phase decomposition in alloys by considering HEA as various pseudo-binary systems, as shown in Figure 10, which predicts that phase decomposition in Hf-Nb-Ti-Zr alloys with a BCC structure occurs at temperatures below the critical temperature of 1298 K. The HEA decomposes most favorably into NbTarich and HfZr-rich BCC phases, while the BCC-rich HfZr phase is transferred to the hexagonal compact stacking structure (HCP) phase at low temperatures. (Chen X. et al, 2022;Chen Z. W. et al, 2022).…”

Plasmonic Ag/Cu/PEG nanofluids prepared when solids meet liquids in the gas phase

“…The NPs were randomly generated immediately below the surface within the horizontal interval of -10 m < X < 10 m. The rate of NP generation corresponded to the flux of 7×10 11 NPs/m 2 s, at which they arrived in the experiments onto the PEG surface. The NPs were not allowed to cross the surface plane, although they were allowed to move freely in any other direction without sticking to each other.…”

“…3,4 The formation of finely dispersed metal NPs was observed, which gave an impetus to the development of this method. [5][6][7][8][9][10][11][12] A downside of the methodology is that only liquids with low equilibrium vapor pressure can be used; on the other hand, the method is beneficial in avoiding multiple chemical protocols and purification steps, providing a platform for ultrapure metal/host medium interaction unmediated by the presence of linkers or chemical residues. Recently, more complex systems have been proposed that combine two or several metals to produce alloy nanofluids such as Ag-Au, [13][14][15][16][17] Pt-Au, [18][19][20] Pd-Au, 21,22 Au-Cu, 12,23,24 Ag-Pt, 9 Cu-Pt, 25 Ru-Au, Ru-Cu, Ru-Au-Cu, 12 CoCrCuFeNi (high entropy alloy).…”

“…Recently, more complex systems have been proposed that combine two or several metals to produce alloy nanofluids such as Ag-Au, [13][14][15][16][17] Pt-Au, [18][19][20] Pd-Au, 21,22 Au-Cu, 12,23,24 Ag-Pt, 9 Cu-Pt, 25 Ru-Au, Ru-Cu, Ru-Au-Cu, 12 CoCrCuFeNi (high entropy alloy). 11 In 2021, our group pioneered an approach for the preparation of single metal/polymer nanofluids (Cu/PEG) using a sputterbased gas aggregation cluster source (GAS). 26 In this method, metal is sputtered by a dc magnetron in a separate vacuum chamber under increased pressure of cold inert gas (Ar) to produce NPs in the gas phase.…”